XXX merge, vutil.h, probably combine with final vutil.c

vutil.h

@@ -223,21 +223,28 @@ const char * Perl_prescan_version(pTHX_ const char *s, bool strict, const char**
 #endif
 
 
-#if PERL_VERSION_LT(5,19,0)
-# undef STORE_NUMERIC_LOCAL_SET_STANDARD
-# undef RESTORE_NUMERIC_LOCAL
-# ifdef USE_LOCALE
-#  define STORE_NUMERIC_LOCAL_SET_STANDARD()\
-	char *loc = savepv(setlocale(LC_NUMERIC, NULL)); \
+#if PERL_VERSION_LT(5,27,8)     /*XXX use correct version */
+#  define LC_NUMERIC_LOCK
+#  define LC_NUMERIC_UNLOCK
+#    if PERL_VERSION_LT(5,19,0)
+#   undef STORE_LC_NUMERIC_SET_STANDARD
+#   undef RESTORE_LC_NUMERIC
+#   undef DECLARATION_FOR_LC_NUMERIC_MANIPULATION
+#   ifdef USE_LOCALE
+#    define DECLARATION_FOR_LC_NUMERIC_MANIPULATION char *loc
+#    define STORE_NUMERIC_SET_STANDARD()\
+	loc = savepv(setlocale(LC_NUMERIC, NULL));  \
 	SAVEFREEPV(loc); \
 	setlocale(LC_NUMERIC, "C");
 
-#  define RESTORE_NUMERIC_LOCAL()\
+#    define RESTORE_LC_NUMERIC()\
 	setlocale(LC_NUMERIC, loc);
-# else
-#  define STORE_NUMERIC_LOCAL_SET_STANDARD()
-#  define RESTORE_NUMERIC_LOCAL()
-# endif
+#   else
+#    define DECLARATION_FOR_LC_NUMERIC_MANIPULATION
+#    define STORE_LC_NUMERIC_SET_STANDARD()
+#    define RESTORE_LC_NUMERIC()
+#   endif
+#  endif
 #endif
 
 #ifndef LOCK_NUMERIC_STANDARD